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5 Operation
In case of co-existance of two or more of the following conditions:
high ambient temperature
High liquid temperature
duty points insisting on unit maximum power
persisting undervoltage of mains,
may jeopardise the life of the unit, and/or derating may occur: for further information contact
Xylem or the Authorised Distributor.
5.1 Wait times
WARNING: Electrical hazard
Contact with electric components may cause death, even after the unit has been switched off.
Before any interventions on the unit, the network voltage and any other input voltages must be
disconnected for the minimum time indicated in Table 9.
Table 9: Wait times
WARNING: Electrical hazard
Frequency converters contain DC-link capacitors that can remain charged even when the
frequency converter is not powered.
To avoid electrical hazards:
Disconnect the AC power supply
Disconnect all types of permanent magnet motors
Disconnect all DC-link remote power supplies, including the battery backups, the
Wait for the capacitors to discharge completely before carrying out any maintenance or
e-SM Drive model
103, 105, 107, 111, 115
303, 305, 307, 311, 315, 322
Uninterrupted Power Supply units and the DC-link connections to other frequency converters
repairs; see Table 9 for the waiting times
en – Original instructions
Minimum waiting times (min)
4
5
25
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